water pump pulley question

The engine is bran new and no blower you can see the engine in the pic above thermostat is a 180 pretty sure..I'll get back to you with the other stuff
I do overdrive the water pump on my 340 with a factory A/C pulley setup.
Also have a Milodon High Flow 160* T stat with a Griffin radiator and a factory fan shroud. Engine rarely gets above 180* with the A/C on.